Mold apparatus with multi-molding chamber

Abstract

A mold apparatus includes a first mold die, a second mold die and an interjacent mold die. The first mold die has a first molding surface. The second mold die has a second molding surface. The interjacent mold die is arranged between the first and second mold dies, and has a third molding surface and an opposite fourth molding surface. The third molding surface and the first molding surface cooperatively form a first molding chamber. The fourth molding surface and the second molding surface cooperatively forms a second molding chamber.

1. A mold apparatus, comprising:
 a first mold die defining a first cavity therein, and a first molding surface formed at a bottom of the first cavity; 
 a second mold die defining a second cavity therein, and a second molding surface formed at a bottom of the second cavity; 
 an interjacent mold die arranged between the first and second mold dies with opposite end portions of the interjacent mold die received in the respective the first and second cavities, the interjacent mold die having a flange formed at a middle portion thereof, the first and second mold dies in contact with opposite surfaces of the flange, the interjacent mold die having a third molding surface and an opposite fourth molding surface, the third molding surface and the first molding surface cooperatively forming a first molding chamber, the fourth molding surface and the second molding surface cooperatively forming a second molding chamber; and 
 a sleeve receiving the first mold die, the second mold die and the interjacent mold die therein and in contact with a peripheral surface of each of the first mold die, the second mold die and the flange of the interjacent mold die. 
 
     
     
       2. The mold apparatus of  claim 1 , wherein each of the first and second cavities has a frustoconical section and a cylindrical section proximate to the frustoconical section, each of the frustoconical sections has a first inclined surface, and each of the cylindrical sections has a first vertical surface; each of opposite end portions of the interjacent mold die has a frustoconical portion, and a cylindrical portion proximate to the frustoconical portion, each of the frustoconical portions has a second inclined surface and an end surface, each of the cylindrical portions has a second vertical surface, the second inclined surfaces in contact with the respective first inclined surfaces, the second vertical surfaces in contact with the respective first vertical surfaces, the third and fourth molding surfaces being formed on the respective end surfaces. 
     
     
       3. A mold apparatus comprising:
 a plurality of separate mold dies each defining a first cavity therein, and a first molding surface formed at a bottom of the first cavity; 
 a unitary interjacent mold die having a plurality of second molding surfaces, opposite end portions of the unitary interjacent mold die received in the respective first cavities, the mold dies attached to the unitary interjacent mold die with the first molding surfaces thereof facing toward the respective second molding surfaces of the unitary interjacent mold die, thereby forming a plurality of separated molding chambers between the first and second molding surfaces; wherein each of the first cavities has a frustoconical section and a cylindrical section proximate to the frustoconical section, each of the frustoconical sections has a first inclined surface, and each of the cylindrical sections has a first vertical surface; each of opposite end portions of the unitary interjacent mold die has a frustoconical portion, and a cylindrical portion proximate to the frustoconical portion, each of the frustoconical portions has a second inclined surface and an end surface, each of the cylindrical portions has a second vertical surface, the second inclined surfaces in contact with the respective first inclined surfaces, the second vertical surfaces in contact with the respective first vertical surfaces, the second molding surfaces being formed on the respective end surfaces; and 
 a housing receiving the separate mold dies and the unitary interjacent mold die therein and in contact with a peripheral surface of each of the separate mold dies and the unitary interjacent mold die. 
 
     
     
       4. A mold apparatus comprising:
 a plurality of separate mold dies each defining a first cavity therein, and a first molding surface formed at a bottom of the first cavity; 
 a unitary interjacent mold die having a plurality of second molding surfaces, opposite end portions of the unitary interjacent mold die received in the respective first cavities, the mold dies attached to the unitary interjacent mold die with the first molding surfaces thereof facing toward the respective second molding surfaces of the unitary interjacent mold die, thereby forming a plurality of separated molding chambers between the first and second molding surfaces; wherein the unitary interjacent mold die has a flange formed thereon, the flange spaces apart the opposite end portions of the unitary interjacent mold, the separate mold dies are in contact with opposite surfaces of the flange; and 
 a housing receiving the separate mold dies and the unitary interjacent mold die therein and in contact with a peripheral surface of each of the separate mold dies and a peripheral surface of the flange of the unitary interjacent mold die; 
 wherein each of the first cavities has a frustoconical section and a cylindrical section proximate to the frustoconical section, each of the frustoconical sections has a first inclined surface, and each of the cylindrical sections has a first vertical surface; each of opposite end portions of the unitary interjacent mold die has a frustoconical portion, and a cylindrical portion proximate to the frustoconical portion, each of the frustoconical portions has a second inclined surface and an end surface, each of the cylindrical portions has a second vertical surface, the second inclined surfaces in contact with the respective first inclined surfaces, the second vertical surfaces in contact with the respective first vertical surfaces, the second molding surfaces being formed on the respective end surfaces.